The event kicks off the start of 'Slurpee Season' in the most fun and creative ways possible. Customers can fill up their own cups with a flavored Slurpee for only $1.50 starting on Friday, May 19, and Saturday, May 20, from 11 a.m. until 7 p.m. at participating 7-Eleven stores nationwide.

Some of the flavors you can sample are the new Pepsi Fire cinnamon-flavored Slurpee, watermelon lime, black cherry and blue raspberry.

However there are some rules to follow:

Whatever "cup" you bring, it must fit through an in-store display with a 10-inch diameter hole.